Daily Escape

Photo by Hyde John/ Perpectives/ Getty Images

Mendenhall Glacier Caves

Juneau, Alaska

Daredevils risk their lives to see the magnificent Mendenhall Glacier caves, The most popular cave collapsed in July 2014. Adventurers first kayak to the 12-mile-long glacier and then ice-climb to the caves inside. Recently, rising temperatures have caused the caverns to shrink to 1/3 of their original size, resulting in dramatic shifts of color inside. Scientists have even discovered ancient trees that have been frozen for 1,000 years, unearthed by the massive, receding glacier.